Cellphone has been a part of our life, which is more acceptable in classroom. When smartphone become popular, its size and function have been improved all the time, but the battery can't last as long as its original situation. We need to charge smartphone when we see the warning of rest battery. Most people like to charge the phone before they sleep, then the next morning the 100% battery on screen makes them feel comfortable. But according to the latest study, a new research showed that full battery is not the most suitable situation for smartphone. It is best to maintain 60% to 70% battery, because full situation is a burden to the phone. So don't let your phone charge the whole night, or it will damage the long-term use of battery.
There is no doubt that cell phone has been part of our life. We use it to keep in touch with our friends and families. Its functions have been developed a lot as time goes by. Almost every middle sch...（查看全文）
When cellphone became popular many years ago, parents and school at first banned students to take cellphone into classroom, but now, even the small child has owned a cellphone. The use of cellphone c...（查看全文）
Directions: For this part, you are allowed 30 minutes to write a short essay on mobile live video broadcasting. You are required to write at least 150 words but no more than 200 words. 参考范文： In...（查看全文）
话题： 据统计，2007年上半年手机用户量超过5亿，出现这种情况的原因有哪些呢？对这一现象你有什么看法呢？下面是小编整理的关于“手机用户”的四级作文范文。 参考范文： ?As is shown in the chart, cell phones...（查看全文）